Popular calculators
Compound Interest Calculator
See how your savings grow over time with compounding, plus a year-by-year chart.
Calculate now →Mortgage Calculator
True monthly cost with taxes, insurance, PMI and HOA — plus extra-payment savings.
Calculate now →Refinance Calculator
Monthly savings, break-even month, and total interest: old loan vs. new loan.
Calculate now →Credit Card Payoff Calculator
Snowball vs. avalanche side-by-side: which strategy gets you debt-free cheaper?
Calculate now →Retirement Calculator
Project your nest egg and sustainable monthly income with the 4% rule.
Calculate now →Investment Calculator
CAGR, nominal vs. inflation-adjusted returns, with historical presets.
Calculate now →Income Tax Calculator
2026 federal + state taxes and your real take-home pay, paycheck by paycheck.
Calculate now →ROI Calculator
Return on investment, annualized ROI, CAGR and payback period in one place.
Calculate now →Profit Margin Calculator
Margin vs. markup, plus reverse pricing: set a margin target, get your price.
Calculate now →Why CalcWise?
Most financial calculators are either buried in ads or ask for your email before showing a single number. CalcWise is different: every calculator runs entirely in your browser, shows its work, and explains the math in plain English. We publish the formulas we use, cite reputable sources in our guides, and never sell your data — because there is no data to sell. Nothing you type ever leaves your device.
Our guides are written to be genuinely useful: short enough to read in five minutes, thorough enough to act on. Whether you are comparing mortgage offers, planning retirement contributions, or just curious what $200 a month becomes in 30 years, you will find a straight answer here.
A note on trust: CalcWise is an educational tool, not a financial advisor. Our calculators do precise math, but they cannot know your tax situation, risk tolerance, or life plans. Always read our disclaimer, and talk to a licensed professional before making major financial decisions.